.knowledge-menu-container{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;padding:20px}.knowledge-menu-content{max-width:1200px;margin:0 auto}.back-button-knowledge{cursor:pointer;color:#764ba2;background:#fff;border:none;border-radius:10px;margin-bottom:30px;padding:12px 25px;font-size:1rem;font-weight:700;transition:all .3s;box-shadow:0 4px 10px #0003}.back-button-knowledge:hover{transform:translateY(-2px);box-shadow:0 6px 15px #0000004d}.knowledge-subject-header{text-align:center;color:#fff;margin-bottom:50px;animation:.6s slideDown}.knowledge-subject-header h1{text-shadow:2px 2px 8px #0003;margin-bottom:15px;font-size:3rem}.knowledge-subject-header p{opacity:.95;max-width:600px;margin:0 auto;font-size:1.2rem}.knowledge-topics{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:25px;margin-bottom:50px;display:grid}.knowledge-topic-card{cursor:pointer;text-align:center;background:#fff;border-radius:15px;padding:35px 25px;transition:all .4s cubic-bezier(.68,-.55,.265,1.55);position:relative;overflow:hidden;box-shadow:0 10px 30px #00000026}.knowledge-topic-card:before{content:"";height:4px;transition:all .3s;position:absolute;top:0;left:0;right:0}.knowledge-topic-card:hover{transform:translateY(-15px)scale(1.05);box-shadow:0 20px 50px #00000040}.science-topic:before{background:linear-gradient(90deg,#4caf50,#45a049)}.gk-topic:before{background:linear-gradient(90deg,#f5a623,#e08e0b)}.health-topic:before{background:linear-gradient(90deg,#e2534d,#c0392b)}.knowledge-topic-icon{margin-bottom:15px;font-size:3.5rem;animation:2s ease-in-out infinite bounce;display:block}.knowledge-topic-card:hover .knowledge-topic-icon{animation:.6s ease-in-out spin}.knowledge-topic-card h2{color:#333;margin-bottom:10px;font-size:1.6rem;font-weight:700}.knowledge-topic-card p{color:#666;margin-bottom:20px;font-size:.95rem;line-height:1.6}.knowledge-start-button{color:#fff;cursor:pointer;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border:none;border-radius:50px;padding:12px 30px;font-size:1rem;font-weight:700;transition:all .3s;box-shadow:0 6px 20px #764ba266}.knowledge-start-button:hover{transform:translateY(-2px);box-shadow:0 8px 25px #764ba299}@keyframes slideDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes spin{0%{transform:rotate(0)scale(1)}to{transform:rotate(360deg)scale(1.1)}}@media (max-width:768px){.knowledge-subject-header h1{font-size:2rem}.knowledge-subject-header p{font-size:1rem}.knowledge-topics{grid-template-columns:1fr;gap:15px}.knowledge-topic-card{padding:20px 15px}}